Stapling-machine.



J. H. FULLER.. sAPLlN MAcHlNE.v APPLICATION FILED DEC. 19. I9l6.

, Patented 001,; 16, 1917.

"Lmwm J. H. FULLER.

STAPLINGMACHINE.

APPLICATION man vEc.19. 1915.

Patented 001;. 16,1917'.

3 SHEETS-SHEET 2.

l. H. FULLER.

STAPLING MACHINE.

APPLICATION FILED DEC-19.1916. LQIQ-. Patented m1512917.

3 SHEETS-SHEET 3.

narran earns STARLINGMACHI1TE speiacation of Letters Patent.

Patented Unt# I6, 191'?.

Application led December 19, 1916. Serial No. 137,880.

To all 'whom t may concern.'

Beit known that I, JAK H. FULLER, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented 'certain new and useful Improvements in vStapling-Machines, ofwhich theV following is a fullv and clear specification.

The present invention relates to improvements in the type of staplingmachines in which wire is intermittently fed from a continuous roll intothe staple forming and inserting mechanism, which cuts 0E a length ofwire, furnis it into a staple and inserts it in a bunch of sheets,signatures or other articles to be bound together.

The object of the present invention is to improve and simplify theconstruction of this type of machine and to this end the inventioncomprises a stapling head in which is mounted a reciprocating recessedwire cutting and staple forming plunger, with v a male die membercoperating therewith for forcing a length of wire into the recess ofsaid forming plunger and a staple driviillg plunger mounted upon theforming plunger and adapted to force the formed staple through theobject to be bound against a suitablefstaple clenching anvil. Anoscillating operating head is connected through an eccentrically pivotedpitman with the staple driving plunger which reciprocates upon and withthe staple forming plunger,

and an automatic dog is mounted betweenI the pitman/ and driving plungerto engage a shoulder upon the forming plunger and prevent relativemovement between the forming and driving plungers during the initialstroke in forming the staple, so as to insure placing a completed staplewithin the forming plunger and pressing the charged plunger against theobject to be bound prior to the movement of the driving plunger, whichforces the staple through the object and causes its inner ends to beclenched underneath. This oscillating operating head may be operated byhand or power. The operating head with the pitman connecting the stapledriving plunger constitutes, in effect, a toggle mechanism 1n which thepivot of the operating head and the pivotal connections vof the pitmanwith j the head and drivingv plunger are brought in line with the pitmanatthe oo mpletlonof each stroke. In performing thls operative strokewith the toggle operating mechanism, the automatic dog retains itsengagement with a shoulder on the forming plunger until near thecompletion of the stroke when an engagement between the pitman and the[upper end of the dog disengages it from the forming plunger andv allowsthe driving plunger to move downwardly through the e forming plunger.

Any suitable wire feeding -mechanism may be employed in my improvedstapling machine, but in the preferred form of wire feed I provide thestapling head with a pair l of wire gripping rolls, one off which isspring-pressed and eccentricallymounted to engage and hold the wireagainst backward movement, and an oscillatry feed lever carrying in itslower end a pair of wire gripping rolls of the same description as thosereferred to and having operative engagement atits upper end with theoscillating operating head above described.,

In the staple forming mechanism the male die member, which presses thelength of wire into the recess of the staple forming plunger, isactuated by suitable cam mechanism to move it out of the path of theforming and driving plungers at the completion of its work. 'Ihis membermay be in the form of a spring pressed -hook moved `out of activeposition by a cam face on the forming plunger ^or it may be in the formof a sliding head held in position by a suitable spring and pressed voutof active position by a cam face on the forming plunger.

In order that my invention may. be fully understood it will first bedescribed with reference to the accompanying drawings and afterwardpointed out more particularly in the annexed claims. f

In said drawings, c v

V Figure l is a front elevation ofthe preferred form of my improvedstapling ma'n chine;

Figs. 2 and 3 are detail views of the main portions ,of the same,showing successive shifted positions of the parts in the formation anddriving of a wire staple;

Fig. 4 is an edge view Yof' the machine, partly in section to bettershow the operative parts;

Fig. 5 is a detail view looking from the of the bearing block, which isshown removed rom the head; i

we y

rear of thestapling head at the inner face by set screws supply wire,

iet

from a base plate 1 isa stapling head 2,

supported by the curved bracket arm 3, and carrying the upright bracketarm 4 and a horizontal bracket arm 5.

The front-:face of the stapling head 2 1s formed with;l a shallowvertical guideway or recess 10, of-the proper width to receive thestaple forming and driving plungers presently front plate, secured tothe stapling head 2, 16 and formed upon its inner face with a verticalguideway or channel 17, which is complementary to the guideway 10 of thehead.

20 is' the staple forming plunger inthe shape of an oblong block, havingrecessed upper end 21 and recessed lower end 22. The lower edge of theplunger block 20 is formed with wire receiving, grooves 23, best showninFig. 5a of the drawings. vThe inner faces of the two arms of the lowerend of plunger 20 formed by recess 22, have vertical wire receivinggrooves 24, one of which is seen in Fig. 5. The plunger 2O has athickened portion at one side, upon its rear face, as shown at 25, witha lower beveled cam face shown at 26, for the purpose here-l inafterexplained. The side face of plunger 20 at the lower end of the thickenedportion acts as a cutting off knife for the in the manner which will bepresently explained. The upper bifurcated portion 21 of the plunger 20is cut out sufliciently to receive the head of the staple drivingplunger, presently to be referred to and the upper end 27 of thethickened side of the plunger constitutes a shoulder for the engagementof the automatic dog, which connects the forming and driving plungers,as hereinafter explained.

30 is the staple driving plunger formed of an elongated bar of steelwhich rests snugly in a channel 28, formed in the front face of theplunger 20. Atthe lower end of the driving plunger 30 is an integralrearwardly projecting block 31, formed with laterally presented verticalribs 32, which engage and slide in the vertical grooves 24 inthe sidewalls of the bottom recess of plunger 20. The vertical thickness of theblock 31 is approximately one-half the vertical depth of the reces 22,so that when the plunger 30 is raised to its limit upon the plunger 2Othe unoccupied'recess beneath the block 31 `will determine the depth ofthe staple formed in the plunger '20.

to be referred to. 15 is a removable Mounted between the pitman 40 andthe i plunger head 35 is the freely journaled automatic dog 45,'whoselower end is adapted to engage the shoulder 27 of plunger 20 to latchthe Atwo plungers together. The upper arm of dog 45 is formed with aninwardly projecting lug 46, which is presented between the pitman 40 anda shoulder 43 formed on the oscillating operating head which willpresently be explained. The pivot screw 41 is threaded into the head 35.

50 is the oscillating operating head freely journaled upon the mainsupporting pivot 51, extending through the upright bracket arm 4. Head50 is formed with an integral operating hand lever 52. A retractingspring 55 is wound upon the journal 51 and secured thereto at its innerend, while its outer end is secured to a pin 56, carried by theoscillating head 50. The spring 55 tends to hold the operating head andparts connected therewith in their initial position ready to operate andto return the parts to this position, after each operation.

The pitman 40 yis its upper end by pivot screw 44, with the oscillatingoperating head 50, the pivotal connection being made at a pointeccentric to the pivot 5l. This pivotal connection 44 is made in amilled out face 50a of the head 50, thereby forming the shoulder 43above referred to and providing the space within which the pitman 40 andautomatic dog 45 partly rest. A stop lug 52a formed integral with thehandle 52, is designed to contact with the stapling head 2 at thecompletion of the operating stroke of the head, for lim`' iting movementin this direction.

The verticalchannel 1 0 in the stapling head 2 is enlarged at the lowerend of the head to receive a disk shaped body 60, carrying the male diemember in the form of an oblong lug or head having squared upper androunded lower ends. This die member 65 is mounted upon a supportingrod.61, which passes freely through an opening 62, extending rearwardlythrough the lower portion of the stapling head, a wire spring 63 beingmounted upon the stapling head and engaging the rod 61 for holding thedie member 65 pressed normally forward in the plane of the stapleforming and receiv ing grooves 23 and 24 of plunger 20. The disk-shapedportion 60 of this die member has a segmental cut out portion to presentthe straight edge 60a in the path of the cam 26, above referred to, sothat in the reciprocation of plunger 20 the cam 26 will engage the edge60a of the die member and forcethe die rearwardly against its springplungers 2 0 and 30.

pivotally connected at i igiene/i,

The front plate 15 is cut out at the left, as shown in Fig. 1 to receivean eccentrically mounted spring pressed wire gripping roll 75, mountedupon set screw' 76, threaded into stapling head 2. A spring coiled uponthe screw 7 6 and engaging the eccentric pin 77 holds the roll 75 with ayielding pressure in engagement with the wire which passes in from thatside of the stapling head. The wire is supported below by the face ofcut out portion of front plate `15, although, if desired, a suitableanti-friction roller may be provided for supporting the wire. The wirepassing beneath the grip roller enters a suitable opening shown at 80directly beneath the transverse grooves 23, iny the' lower end ofplunger 20, provision being made for the feed of a sufficient length ofwire beneath gripping roll 75 to form a staple of the desired size.

Mounted upon the horizontal frame arm 5 is a cylindrical box or casing85, in which is mounted a rotatable wire spool 86 held in place by atension nut 87, threaded upon a bolt 88 which passes from arm 5 throughthe boX 85. The tension spring 89 (shown in dotted lines in Fig. 1) isconfined between the spool 86 and the back of the lcylindrical casing85, so that by adjusting the nut 87 the proper tension can be vplacedupon the spool 86 to meet the requirements of the wire feeding device.

90 is an oscillating feed arm pivotally mounted upon the screw 91threaded into the frame arm 5. Upon the lower end of this arm 90 is agrooved wire supporting roller 92, over which the wire from the spool 86passes. Coperating with the supporting roll 92 is an eccentricallymounted spring-pressed feed roll 93, journaled at 94 en arm 90 andengaged eccentrically by a suitable spring (not shown), coiled uponscrew 94. The upper end of the arm or lever 90 is formed with alaterally, presented head 95, which rests normally in the square socket50" formed in the oscillating head 50. This socket 50b is outapproximately parallel withthe horizontal diameter of the oscillatinghead while it is resting in its normal retracted position. The head isprojected beyond the wall of theI socket 50h to form a nose 50c which isdesigned to engage the feed lever 90 upon the return stroke forrestbring the feed lever to its initial position. The oscillatingoperating head 50 also has a concentric surface 50d which engages theupper end 95 of lever 90 during the stapl/e forming and driving stroke.

Mounted directly beneath the staple forming and driving plungers 20 and30 is a staple clenching anvil which may be of usual construction, withprovision for properly adjusting the clenching anvil either as a wholeor in parts. is a gage plate mounted upon the forward end of asupporting rod 106, which passes through an opening in the bracket arm 3and is held in the desired adjusted position by a set screw, such asshown at 107.

In Figs. 6 and 7 I show a slight modification of the stapling head inwhich is employed a hook-shaped die member to take the place of the diemember 65, above referred to. This member 110 is journaled upon a rod111, mounted in the forwardly presented studs 112 of the stapling headand engaged by U-shaped spring 113, which is coiled upon the rod 111 andhas its opposite ends engaged by the front plate. A shoulder upon thehook is presented beneath the bifurcated lower end of the staple formingmember 20, in substantially the same position as the member 65, ispresented in the preferred form. When the staple is formed in member 20bythe engagement of the hook 110 with the wire, said hook is moved outof the path of the two plungers by the cam action of the lower en'd ofone of the plungers on the projecting portion of the hook.

The operation of the machine will be understood from the following briefdescription.

Assuming the wire to be properly threaded into the stapling head throughthe feed rolls of the feed arm 90, the papers to be stapled are placedin position against the gage 105 above the anvil 100. rlhe operatinghead is then moved quickly to the right with the result that the toggleconnection g with the driving plunger and the latching of the drivingplunger to the staple forming plunger, through dog 45, will cause theseplungers to move downwardly together, irst cutting od a length of wire(which is fed in during this kinitial movement of the plungers) betweenthe edge of the face plate 15 and the edge of the plunger 20, thenforming a staple by bending said wire over the head 65 up into thegrooves 24 of recess 22, then causing head 65 to recede out of the pathof the plungers and finally moving the plungers downwardly until theplunger 20, charged with the formed staple, is in contact with thepapers 'above the anvil, the downward movementof the plunger being thusarrested by its engagement with the parts on the anvil, and thecontinued movement of the operating head forcing dog 45 out ofengagement with the shoulder 27 .of plunger 20, which unlatching of thetwo plungers, permits the staple driving plunger 30 to pass ondownwardly alone, with the result that the staple will be pushed out ofthe grooved recessed lower end of plunger 2O and forced through thepapers and have its ends turned and clenched upon the under side. Uponthe release of the handle 52, its spring will return it to its initialposition, restoring the operating parts to their 1. In a staplingmachine, the combination of a stapling head, suitable Wire feedingmeans, relatively movable staple forming and driving plungers mounted insaid stapling head, an oscillating operating head,

a pitman pivoted at one end to one of saidl plungers and at its oppositeend to said operating head, and a dogD normally locking said plungersagainst relative movement and formed with a part Which projects into thepath of parts of said operating head and said pitman.

2. In a stapling machine, the combination of a stapling head, suitablewire feeding matassa means, relatively movable `'staple forming anddriving plungers mounted one u on the other in said stapling head, anoscillating operating head, a `pitman having a pivot at one end toconnect with said driving' plunger and another pivot at its opposite endto connect With said operating head, and a dog mounted upon thePitman-plunger pivot and adapted to engage said forming plunger.

3. In a stapling machine, the combination of a stapling head, areciprocating staple forming plunger mounted in said head and formedwith recesses in its opposite ends, a

staple driving plunger mounted upon sald forming plunger, a dog pivotedupon said i driving plunger in position to engage a shoulder on saidforming plunger and movable out of said engagement into the recess inthe upper end of said forming plunger, qmeans for feeding Wire to thestapling head, a staple clenching anvil coperating with the forming anddriving plungers, operating means for said plunger-s, and means forautomatically engaging With and dis-engaging said dog from the formingplunger. i

HJAK H. FULLER.

